Jeep cherokee 2000 Service Manual page 807

XJ
SPECIFICATIONS (Continued)
DESCRIPTION
Flatness Max.
ROCKER ARMS, PUSH RODS & TAPPETS
Rocker Arm Ratio
Push Rod Length
(Pink)
Push Rod Diameter
Hydraulic Tappet
Diameter
Tappet-to-Bore Clearance
Valve Length (Overall)
Intake
Exhaust
Valve Stem Diameter
Stem-to-Guide Clearance
Valve Head Diameter
Intake
Exhaust
Valve Face Angle
Intake
Exhaust
Tip Refinishing (Max.
Allowable)
SPECIFICATION
0.20 mm - max. for total
length
(0.008 in. max. for total
length)
1.6:1
244.856 to 245.364 mm
(9.640 to 9.660 in.)
7.92 to 8.00 mm
(0.312 to 0.315 in.)
22.962 to 22.974 mm
(0.904 to 0.9045 in.)
0.025 to 0.063 mm
(0.001 to 0.0025 in.)
VALVES
122.479 to 122.860 mm
(4.822 to 4.837 in.)
122.860 to 123.241 mm
(4.837 to 4.852 in.)
7.899 to 7.925 mm
(0.311 to 0.312 in.)
0.025 to 0.076 mm
(0.001 to 0.003 in.)
48.387 to 48.641 mm
(1.905 to 1.915 in.)
37.973 to 38.227 mm
(1.495 to 1.505 in.)
46.5°
46.5°
0.25 mm (0.010 in.)
DESCRIPTION
VALVE SPRINGS
Free Length (Approx.)
Spring Load
Valve Closed
Valve Open
Inside Diameter
Installed Height
PISTONS
Weight (Less Pin)
Piston Pin Bore
(Centerline
to Piston Top)
Piston-to-Bore Clearance
Ring Gap Clearance
Top Compression Ring
2nd Compression Ring
Oil Control Steel Rails
Ring Side Clearance
Compression Rings
Oil Control Rings
Piston Ring Groove
Height
Compression Rings
Oil Control Ring
4.0L ENGINE 9 - 117
SPECIFICATION
47.65 mm (1.876 in.)
316 to 351 N @ 41.656
mm
(71 to 79 lbf. @ 1.64 in.)
898.6 to 969.7 N @
30.89 mm
(202 to 218 lbf @ 1.216
in.)
21.0 mm to 21.51 mm
(0.827 to 0.847 in.)
41.656 mm (1.64 in.)
417 to 429 grams
(14.7 to 15.1 oz.)
40.61 to 40.72 mm
(1.599 to 1.603 in.)
0.018 to 0.038 mm
(0.0008 to 0.0015 in.)
0.229 to 0.610 mm
(0.0090 to 0.0240 in.)
0.483 to 0.965 mm
(0.0190 to 0.0380 in.)
0.254 to 1.500 mm
(0.010 to 0.060 in.)
0.042 to 0.084 mm
(0.0017 to 0.0033 in.)
0.06 to 0.21 mm
(0.0024 to 0.0083 in.)
1.530 to 1.555 mm
(0.0602 to 0.0612 in.)
4.035 to 4.060 mm
(0.1589 to 0.1598 in.)